Read Sony SRF-R405 Service Manual online
— 12 —
4-4. IC PIN FUNCTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
O
O
O
O
–
O
O
O
O
O
I
–
I
I
I
O
O
I
O
–
–
O
I
I
–
–
I
O
–
–
–
–
–
O
O
O
–
O
O
O
O
O
O
O
–
O
O
O
O
O
Description
Serial data output terminal (Not used: open)
Chip selection output to EEPROM (Not used: open)
Band switching output “H”: TV (4 to 12 channels), “L”: FM/TV (1 to 3 channels)/AM (Not used: open)
Audio mute signal output
Not used (Ground)
Power ON/OFF control output
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key return signal input. *1
Not used (Ground)
Key return signal input. *1
Key return signal input. *1
Key return signal input. *1
Meter drive signal output (Not used: ground)
TV mode control signal output (Not used: ground)
Low power voltage detection input (Not used: ground)
Band switching signal output “H”: AM, “L”: FM/TV (1 to 3 channels)
Ground (Ground)
Ground (Ground)
PLL error signal output to PLL low-pass filter (Q401, 402)
VCO input from FM/TV (1 to 3 channels)/AM local oscillator
VCO input from TV (4 to 12 channels) local oscillator (Not used: open)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Power supply input (3 V)
Power supply input (3 V)
System clock output (75 kHz)
System clock input (75 kHz)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Common signal output to LCD
Common signal output to LCD
Common signal output to LCD
Not used (Ground)
Common signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Not used (Ground)
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Pin Name
DATA OUT
EEPROM CS
TV 4-12CH
MUTE
NC
POWER
KS0
KS1
KS2
KS3
KR0
NC
KR1
KR2
KR3
POC0
POC1
V DET2
BAND
GND
GND
EO
VCOL
VCOH
REG0
VDD
VDD
X OUT
X IN
REG 1
REG LCD0
CAP LCD0
CAP2 LCD1
REG LCD1
COM0
COM1
COM2
NC
COM3
LCD0
LCD1
LCD2
LCD3
LCD4
NC
LCD5
LCD6
LCD7
LCD8
LCD9
• IC506 µPD17073GB-921-9EU (System Control, LCD Drive)
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